chore: support envelope in graph:init

[jasonbarry]

Summary

Fixes https://github.com/netlify/pillar-workflow/issues/802 (continuation of #4711)

netlify graph:init creates two new environment variables on the site. It currently saves those env vars attached to the site record in Mongo. However, env vars are moving to a separate service (called Envelope) that has its own API and that is detached from the site record. This PR adds logic to detect that if a site has opted into Envelope, to save the newly created env vars to the Envelope service.

Envelope also supports scoped environment variables, which means you can set env vars to only be present in e.g. builds or only available in functions. I think the ones that Graph sets only need to be in the functions runtime, is that correct?

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[github-actions]

📊 Benchmark results

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Package size: 222 MB

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[jasonbarry]

I deleted this block of code because everything we need should already be available in command.netlify.siteInfo -- is this an incorrect assumption on my part?

[jasonbarry]

Added this conditional to skip over in integration testing

[jasonbarry]

In the test, we set NETLIFY_GRAPH_PERSIST_QUERY_TOKEN to already exist, in order to skip over some of the logic that reaches out using the OneGraph client. I didn't know how to mock that out, so skipped over it to at least test some of the function.

[sgrove]

If you wouldn't mind updating the persist query token scope, I can follow up with a quick approval.

Thanks for taking the time to port this over!

[sgrove]

Are scopes typed? As in, will autocomplete ensure that I'm not putting in spurious scope values?

Also, this token needs to be available in build, please.

[jasonbarry]

Scopes are defined here in the openapi spec for this method -- should anything else be needed to populate autocomplete suggestions in the cli codebase?